Full-stroke mechanism.



D. R. ROWE.

FULL STROKE MECHANISM.

APPLICATION FILED MAR. 18. I915- 1,201,s74, Patented Oct. 17,1916.

awumto'o P R R 4 UNITED STATES PATENT OFFICE.

DON RAY ROWE, OF DAYTON, OI-IIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THEDAYTON TIME LOCK COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

'rULL-s'rRoKn MECHANISM.

Specification of Letters Patent. Patented O t, 17, 1916 Applicationfiled March 18, 1915. Serial No. 15,203.

To all whom it may concern:

Be it known that I, .DON RAY ROWE, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented. certain new and useful Improvements in Full-Stroke Mechanism,of which the following is a specification, reference being had thereinto the accompanying drawing.

This invention relates to a. full stroke mechanism and is in the natureof anim provement upon the full stroke mechanism embodied in anapplication for patent filed by Benard I-I. Ziehler and D. Ray Rgwe Feb.20, 1915, Serial No. 9714. V V

While the invention is here shown as applied to a reciprocating platenof a recording device it will be understood that it is so shown for thepurpose of illustration only and that it is applicable to any similarstructure.

The object of the invention is to provide a single positively. actuateddevice which will prevent the return movement of a reciprocatory memberbefore it has completed its full stroke in one direction. To this end itis a further object of the invention to provide a positively actuatedpawl-controlling device and a positively actuated detent to cooperatewith said pawl-controlling device.

A further object of the invention is to so construct and arrange theparts of the device that they will not onlv be simple and -positive intheir operation but that they will not be easil disarranged or renderedinoperative; and that they can be readily manufactured and easilyassembled.

In the accompanying drawings, Figure 1 is a side elevation of amechanism embodying my invention showing the reciprocatory member at thebeginning of its operative stroke; Fig. 2 is a similar view showing thereciprocatory member at the end of itsoperative stroke; Fig. 3 is avertical sectional view, taken on the'line m a: of Fig. ,4; Fig. 1 1s atransverse, sectlonal view taken on the hue 3 3 of Fig. 3;.andF1g. 5 1sa detail view,

- on a smaller scale, showing the actuating device for the reciprocatingmember.

For the purpose of illustration I have, in the accompanying drawings,shown the'invention as applied to the reoi'procatory platen of arecording look. This platen is indicated by the reference numeral 1 andhas a stem or portion 2 constituting a guide which is slidably mountedin a guideway formed in a bracket 3. As here shown the stem is hollowand has mounted in its upper end a plunger 4, between which and theplaten proper there is interposed a cushioning spring 5. This feature ofconstruction, however, is part of the invention of the above mentionedapplication. Connected with the platen and, in the present instance, tothe plunger t'is an actuating member, here shown as a plate 6, having aslot to receive the plunger -1 which is provided with a head 7 to retainthe same therein. This plateor. actuating member for the platen ismeansemployed in the recording lock of the above mentioned applicationwhich comprises springs 9 secured to-the opposite ends of the plate '6to hold the same normally in its elevatedposition and operating membersor plates 10 mounted on a shaft 11 extending transversely to the line ofmovement of the plate 6 and-having parts on each side of the shaftadapted to engage the plate 6. and press the same against the tension ofthe springs 9 when said shaft is rotated in either direction,thusimparting lon gitudinal movement to the platen and the guide rod 8 forthe plate 6. i

In applying the full stroke device to this mechanism I have provided theguide rod 8 of the plate 6 with a longitudinal series of teeth 12 whichare here shown as ar- ,ranged ontthat side of the rod adjacent to thestem of the platen. A portion of the bracket lying between the rod andthe stem of the platen is cut away to form a recess 13 in which ismounted a pawl 14 having connected therewith a spring 15 which tends tomovethe sametoward the teeth on the guide rod 8. This spring-pressedpawl is so arranged that when the platen is in its uppermost positionthe pawl will engage the surface of the guide rod 8 just below the lasttooth. Consequently, upon the first movement of the platen the guide rodwill move into such a position that the pawl will operatively engage oneof the teeth therein, thus connecting the same with the pawl.

efliectually preventing the movement of the platen until the latter hascompleted its movement in the direction in which it has started. I

To release the platen from the pawl in order that it may return after ithas comabove the bracket 3 and into a position to be engaged by theplate or actuating member 6 asthe latter approaches the lower limit ofits movement, the arrangement being such that the pawlwill becomeinoperative just 7 when the guide rod completes its movement or aninstant before it completes its move ment. It isnecessary that the pawlshould be retained in its inoperative position during the returnmovement of the guide rod and the platen. To this end the controllingmember *has a part constituting a keeper to cooperate with, a latch ordetent. In the present construction this keeper is in the form of afinger 18 projecting from the body of the controlling device andarranged to cooperate with a latch 01' detent :19 which is pi'votallymounted "at 20 on the bracket 3 and has connected thereto a spring 21 soarranged that it tends to move the detent toward the keeper or finger18. During the downward movement of the platen, when the pawl 14 is inengagement with the teeth of the guide rod, the nose of the detent willengage the :end' of the keeper or finger 18,

thereby permitting the pawl to ride over the teeth Without interferingtherewith.

"WVhen the pawl-controlling device is actuatedby the plate tithe fingeror keeper 18 is moved downward to such anextent that the nose ofthedetent will slip over the upper edge thereof, thus locking. thepawl-controlling device in a position to retain the pawl out ofengagement 'with' the teeth of the guide =r0d. the guide rod approachesthe npper limit of its movement the detent is stripped by means of apart connected to "and moving :in unison with the guide-rod.

In the -presentinstance the detent has a toe 22 projecting beyond itsaXis' and into the path of a stud or projection' 23 carried by theplaten, the toe 22 a'nd-studQiB being so arranged that they will bebrought into engagement and the detent moved :out of engagenient withthe finger 18 at or just "prior to the completion of the upward movementof the guide rod. 1 v V The operation of the device willibe rea dilyunderstood from the foregoing description and it will be apparent :that:the device is not only very simple in its construction and operationbut is of a strong, durable character and is so controlled that itsoperation 1s positive; and that it is not liable to become disarrangedor to be rendered inoperative.

Further, it will be apparent that the construction is such as to enablethe device to be readily manufactured and assembled.

As has been explained the present embodiment of the inventionis'for thepurpose of illustration only and the guide rod of the actuating memberfor the platen is here used as illustrative of any reciprocatory memberand such rec'iprocatory member will be the full equivalent of the guiderod when employed in combination with other elements going to make upthe invention. 1, therefore, wish it to be understood that I do notdesire to be limited to the details of construction shown and described,for obvious modifications will occur to a person skilled in the art. a s

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is: V

1. The-combination, with a reciprocatory member havinga longitudinalseriesot teeth, and a pawl .mounted on :a fixed support and arranged toengage said .teeth to hold said reciprocatory member against movement inone direction, of a pawl-controlling device connected with said :pawl, apart connected wvith. said reciprocatory member .to actuate saidpawl-controlling device as the 16011310- -cator-y member approaches theend of 1ts movement in one direction, a detent arranged to engage saidpawl-controlling device when it has been actuated. and a part moving:in-synchironism with said reciproca- :tor-y .member to actuate saiddetent to release said pawl-controlling device as the reciprocatorymember approaches the limit of itsmovement in the other direction.

2. The combi nation, with a reciprocatory member having a longitudinalseriesofteeth, and .a pawl mounted on a fixed support and arrangedtoengage said teeth to hold said reciprocatory member against'movementin one direction, of a pawl-controlling device operatively connectedwith said pawl and comprising a trip arm and a keeper, saidreciprocat-ory member having a part to engage-said trip arm to move saidpawl into aninoperaftive position when said reciproca'tory member movesin one :QlllGClllOIl, a

spring-actuated detent arranged to engage "said keeper when said tr1parm has been actuated, and a partmoving in synchronism with saidreciprocatorymember to actuate said detent to release said keeper whensaid reeiprocato-ry member moves in the opposite direction.

:3. The combination, with a reciprocatory member having a longitudinalseries of teeth, and a pawl mounted on a fixed support and arranged toengage said teeth to hold said reciprocatory member against movement inone direction, of a pawl-controlling device operatively connected withsaid pawl and comprising a trip arm and a keeper, said reciprocatorymember having a part to engage said trip arm and move said pawl out ofengagement with said teeth as the reciprocatory member approaches theend of its movement in one direction, a spring-actuated detent pivotallymounted on a fixed support andhaving a nose held normally in engagementwith the end of said keeper and arranged to operatively engage saidkeeper when movement has been imparted to said tripping arm, said detenthaving a toe projecting beyond its pivotal center, and a part moving insynchronism with said reciprocatory member to engage said toe as saidmember approaches the limit of its movement in the other direction.

4. The combination, with a bracket having a guideway and provided with arecess adjacent to said guideway, a reciprocatory member mounted in saidguideway and having a longitudinal series of teeth arranged adjacent tosaid recess, and a spring-actuated pawl mounted in said recess to engagesaid teeth when said reciprocatory member has been moved from its normalposition, a pawl-controlling device mounted on said bracket andconnected with said pawl, said device comprising a trip arm and akeeper, said reciprocatory device having a part arranged to engage saidtrip arm to move said pawl out of engagement with saidteeth, a detentpivotally mounted on said bracket adjacent to said controlling deviceand having a nose ar ranged to operatively engage said keeper whenmovement has been imparted to said controlling device, and meanscontrolled by the movement of said reciprocatory member in the otherdirection to move said detent out of engagement withsaid keeper.

5. The combination, with a bracket having a guideway and provided with arecess adjacent to said guideway, a reciprocatory member mounted in saidguideway and having a longitudinal series of teeth arranged adjacent tosaid recess, and a spring-actuated 'pawl mounted in said recess toengage said teeth when said reciprocatory member has been moved from itsnormal position, of a pawl-controlling device mounted on one side ofsaid bracket on an axis coincident with the axis of said pawl andrigidly connected with said pawl, said controlling device comprising atrip arm and a keeper, said reciprocatory member having a part to engagesaid trips arm and -actuate said controlling device as the reciprocatorymember approaches the limit of its movement in one direction, a detentpivotally mounted near one end on the side the same to operativelyengage said keeper 7 when said controlling device has been actuated,said detent having a toe pro ectlng beyond its pivotal center, and apart connected with said reciprocatory member and arranged to engagesaid toe and move said detent out of engagement with said keeper as saidreciprocatory member approaches the limit of its movement in the otherdirection.

6. In a device of the character described, a bracket having two.parallel guideways and provided with a recess between said guideways, adevice reciprocally mounted in one of said guideways, a guide rodreciprocally mounted in the other of said guideways, an actuating memberarranged above said bracket and connected with said device and saidguide rod, said guide rod having a longitudinal series of teeth adjacentto the recess in said bracket, and a spring-pressed pawl mounted in saidrecess and arranged to engage said teeth, of a pawl-controlling devicemounted on said bracket and operatively connected with said pawl, saidcontrolling device comprising an arm and a keeper, said arm extendingabove said bracket into the path of said actuating member, aspring-actuated detent pivotally mounted on said bracket and having anose arranged to engage said keeper, said detent also having a toe, anda part carried by said device to engage said toe as said guide rodapproaches the limit of its movement in the opposite direction.

In testimony whereof, I. afiix my signature in presence of twowitnesses.

DON RAY ROWE. Witnesses:

EDWARD L. REED, F. W. SOHAEFER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. 6.

